Form I Part C: Certificate of inspection for site assembled boilers at maker's works
The Inspecting Authority's certificate for the parts of a site-assembled boiler made and inspected at the maker's works.
Pujan Motiwala · Checked against the Gazette on · IBR 2026, in force from 1 October 2026
What is Form I Part C?
Form I Part C of the Indian Boiler Regulations, 2026 is the certificate of inspection for site assembled boilers at maker's works, prescribed under regulation 8(a). Under the Indian Boiler Regulations, 1950 it was Form II(2) (certificate of inspection for site assembled boilers).
Who issues and signs Form I Part C?
The Inspecting Authority, signed by its Competent Person and the Inspecting Authority.
What does Form I Part C record?
- The boiler, maker and maker's number, and that it was built under supervision and inspected at stages by the Competent Person
- Each component's name, drawing number and stamping details
- Test pressure and design pressure in kg/cm² (g)
- That material samples were tested in the Competent Person's presence, and welded seams passed destructive and non-destructive examination
- The maker's drawing number, and that Form IV Part A was countersigned
When is Form I Part C filed, and with what?
Goes with the registration application in place of Form I Part B when the boiler is assembled at site (regulation 8). Form I Part E follows once erection is complete.
What changed for Form I Part C from IBR 1950?
Under IBR 1950 this was Form II(2).
Related forms
- Form I Part A: Inspecting Authority's certificate of inspection during construction, boiler made to a foreign code for export (was Form II-A)
- Form I Part B: Certificate of inspection for shop assembled boilers (was Form II(1))
- Form I Part D: Inspecting Authority's certificate of inspection during construction of boilers with permitted variations from standard conditions (was Form II-B)
- Form I Part E: Inspecting Authority's certificate of inspection after completion of boiler erection at assembly site (was Form II-C)
- Form VIII: Final inspection report for boiler components
Quoted from the regulations (3)
“In case of a boiler which is to be assembled only at site, requirement of the hydraulic test on a completely assembled boiler by the Inspecting Authority shall not apply provided that the individual parts of such boiler have been hydraulically tested and certified by the Inspecting Authority separately”
IBR 2026, regulation 8(a)(ii)
“The Boiler components are stamped as per details below, wherever applicable.”
IBR 2026, Form I Part C
“Samples of materials used in the constructions of the boiler were tested in the presence of the Competent Person and found to comply with the regulations.”
IBR 2026, Form I Part C
See a boiler's IBR folder produced from its material certificates, with a sample company.
Built for a boiler manufacturer: ERP for boiler manufacturers · how the folder is produced
Official sources
- Indian Boiler Regulations, 2026 (Gazette of India, Extraordinary, No. 596). Central Boilers Board, Department for Promotion of Industry and Internal Trade, October 1, 2026.
What this page is not
A guide written by Ahrom Labs from the Gazette text; not legal advice. The Gazette governs wherever this page differs from it, and a state's Chief Inspector of Boilers may set procedures of their own. Last updated .
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